They played The Seasons, by Pytr Tchaikovsky – a set of twelve short character pieces for solo piano. Each piece is the characteristic of a different month of the year in the northern hemisphere.
Freida narrated the poems relating to each month of the year – prior to the music.
If you are interested in listening to the 12 'Seasons' on piano, here is the link to Wikipedia on which you can find them, together with the poems relating to them. www.en.wikipedia.org/wiki/The_Seasons_(Tchaikovsky). A sample of the month of April, as recorded by the Grigoryan brothers can be found below.